19 Articles found

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  • Case study - Filtralite in London

    Case study - Filtralite in London

    World best filter material for purification of drinking When algal blooms put the sand filters under pressure, Thames Water started its own in-house research into new filter materials. Not only did the effort cure the constraint, the use of new ...

  • Case study - Filtralite Fredrikstad

    Case study - Filtralite Fredrikstad

    When renovating the filters the waterworks was interested in testing alternative filter media and replaced the anthracite layer in one of the filters with Filtralite® media for evaluation. Filtralite® is a filter media made of expanded clay ...

  • Case study - Hong Kong

    Case study - Hong Kong

    To meet the forecasted increases in demand for potable water, the new Tai Po Water Treatment Works has been built in Hong Kong. The plant has a production capacity of 1200 Ml/day This solution strongly reduced the chlorine demand for the plant ...

  • How Thames Water reinvented its fast sand filters

    How Thames Water reinvented its fast sand filters

    World best filter material for purification of drinking When algal blooms put the sand filters under pressure, Thames Water started its own in-house research into new filter materials. Not only did the effort cure ...

  • Case study - Bedrichov water treatment plant

    Case study - Bedrichov water treatment plant

    By replacing the filter sand with Filtralite, Bedrichov Water Treatment Plant reduced energy cost by 75 %, doubled the production capacity of each filter and today delivers the best drinking water ever Time is running out The use of sand for ...

  • Case study - Vestfjorden Sewage Plant (Veas)

    Case study - Vestfjorden Sewage Plant (Veas)

    In Norway’s largest sewage plant, Veas in Oslo, Filtralite* has proven extremely durable as both bio substrate and sludge filtering medium. After 25 years of operation with daily back flushing there is no need for replenishing. A river of ...

  • Alternative filter media for potable water treatment

    Alternative filter media for potable water treatment

    Need for Research Roughing filters at London works: Low backwash rates for filters at older works Inability to keep sand clean (rising normalised starting head loss) Vulnerability to algal laden water Loss of production at critical times ...

    M.E. Steele;M.J. Chipps;R. Bayley;A. Mikol;C.S.B. Fitzpatrick

  • A farewell to sand filters

    A farewell to sand filters

    By replacing the filter sand with Filtralite, Bedrichov Water Treatment Plant reduced energy cost by 75 %, doubled the production capacity of each filter and today delivers the best drinking water ever.

  • A farewell to sand filters

    A farewell to sand filters

    By replacing the filter sand with Filtralite, Bedrichov Water Treatment Plant reduced energy cost by 75 %, doubled the production capacity of each filter and today delivers the best drinking water ever A new filtering medium is born After six ...

  • How deep is your BAF? Evaluation of different bed depths for high rate biological denitrification filters with limit of technology pollutant removal

    How deep is your BAF? Evaluation of different bed depths for high rate biological denitrification filters with limit of technology pollutant removal

    Downflow Denitrification Filters are tertiary water and waste water treatment systems that allow denitrification and suspended solids removal to occur in a single step and allow limit of technology pollutant removal. With more and more stringent ...

    Mudit Gangal;Christophe Desmottes;Amit Kaldate;Sunil Mehta

  • Biological wastewater treatment Dalian, China

    Biological wastewater treatment Dalian, China

    To manage the demands set for the plant, a biological treatment with fixed bed was chosen. The water first undergoes pre-treatment by screening and grit/grease removal. Primary sedimentation is done in 4 tanks with lamellar sedimentation.   ...

  • Biological drinking water treatment Hong Kong

    Biological drinking water treatment Hong Kong

    The water treatment works takes water from the river Dongjiang in the Guangdong Province north of Hong Kong. The raw water has an average turbidity level of around 11 NTU and contents, among other things, ammonia and manganese. Water temperatures ...

  • Dual-media filters, Fredrikstad waterworks, Norway

    Dual-media filters, Fredrikstad waterworks, Norway

    Fredrikstad Waterworks in southeastern Norway has an annual water production of 15 mill. cubic metres and supplies the municipalities Fredrikstad and Hvaler. During autumn 2003 they have renovated their dual-media filters. After around 8 years of ...

  • Case study - Upper Uvdal wastewater treatment plant - Filter bed

    Case study - Upper Uvdal wastewater treatment plant - Filter bed

    The plant is designed as a traditional chemical and biological treatment plant, as a polishing step the effluent is going thru a filter bed with Filtralite before it is discharged into a small creek. The filter bed treatment plant is built with ...

  • Haugslia wastewater treatment, Norway

    Haugslia wastewater treatment, Norway

    Haugslia is a cluster of high standard holiday homes in Voss municipal in Hordaland. 50 of these holiday homes are connected to the treatment plant. These 50 holiday homes give a dimensioning flow of: Qdim = 68 m3/day.The treatment plant was built ...

  • Lauvåsen wastewater treatment in filter beds Norway

    Lauvåsen wastewater treatment in filter beds Norway

    Lauvåsen is a cluster of houses, holiday homes and a tourist resort in Sør-Fron municipal in Norway. 25 holiday homes, 3 houses and one tourist resort are connected to the treatment plant. This gives a dimensioning flow of: Qdim = 63 m3/day, a ...

  • Biological filtration of poor quality brackish water reducing Reverse Osmosis membrane fouling

    Biological filtration of poor quality brackish water reducing Reverse Osmosis membrane fouling

    Abstract A primary limitation in applying Reverse Osmosis (RO) is loss of performance caused by membrane fouling resulting from compounds that bacteria can use as energy or nutrient sources. When these compounds enter RO membranes, they are capable ...

    Hans Peterson;Robert Pratt;Roberta Neapetung;Ole Sortehaug

  • Building on tradition

    Building on tradition

    A new technology is making a name for itself in potable water filtration. And, according to AMT Systems, it is the most cost-efficient advance since the introduction of the dual media filter. Your filters need to be washed every day. What would ...

  • Biological water treatment effective in Saddle Lake

    Biological water treatment effective in Saddle Lake

    Three transparent pipes connected to a network of hoses and gauges stretch from the floor to the 14-foot ceiling in a back room of the Saddle Lake water treatment plant. Water burbles through the pipes, mixing with a material that looks like black ...

    Rachel De Waal